Telephone conferencing device



FIG. 1 is a top perspective view of a telephone conferencing device showing our new design;

FIG. 2 is a side elevation thereof;

FIG. 3 is a side elevation of the side opposite that shown in FIG. 2;

FIG. 4 is a front elevation thereof;

FIG. 5 is a rear elevation thereof; and,

FIG. 6 is a top plan view thereof.

The broken lines shown in the drawings are included for purposes of illustration and form no part of the claimed design. 

The ornamental design for a telephone conferencing device, as shown and described. 